Union Carbide Corporation

Arco Chemical Technology, L.p.

Union Carbide Chemicals and Plastics Company, Inc.

Union Carbide Chemicals & Plastics Technology Corporation

Bayer Antwerp, N.v.

Frank E Critchfield

Richard M Gerkin

Donald W Simroth

Paul M Westfall

James L Lambach

Keith D Cavender

Mark R Kinkelaar

Leslie E Hawker

Stuart L Watson

Richard C Myerly

Otis M Baker

Robert D Brasington

Anthony J Papa

William A Gill

Michael W Jorgenson

Edgar G Shook

George H Armstrong

Mark J Perry

Frank Paul Del Giudice

Richard Lee Rollins

Richard J Zdrahala

William Patten

Siusun K Leung

Energy absorbing rigid polyurethane foams have both high energy absorbing efficiency as well as exceptional recovery after deformation, allowing their use in visible energy absorbing structures, particularly in the transportation vehicle industry. The foams are prepared by reaction of one or more di- or polyisocyanates with a polyol component containing both high and low molecular weight polyols, and optionally chain extenders, crosslinkers, and other additives, wherein at least one polyol is a polymer polyol such that the total vinyl polymer solids content of the foam is greater than 15 weight percent.

Energy management polyurethane rigid foams with high recovery

High resilience polyurethane foams having improved wet set properties are obtained by reacting an isocyanate with a polyol component consisting of a polyoxyalkylene polyol with a functionality of 6 or more and a polymer polyol whose base polyol is a polyoxyalkylene polyol with a functionality of 6 or more, both polyols having oxyethylene caps in amounts of from 12 percent to about 30 percent based on the weights of the respective polyols, in the presence of an amine catalyst system. The resulting polyurethane foams are eminently suitable for seating cushions used in tropical or subtropical environments, may be prepared by a cold molding process, and may be used without an elevated temperature post cure.

Process for manufacturing foam with improved wet set properties

Cold molded flexible polyurethane foams may be prepared from low primary hydroxyl Polyoxyalkylene polyols when polyoxyalkylene polyols having an unsaturation of 0.02 meq/g or less provide the substantial portion of the polyol component.

One-shot cold molded flexible polyurethane foam from low primary

The present invention provides polymer polyols and a method for preparing polymer polyols which have (1) exceptional dispersion stability, especially at high styrene contents, and (2) substantially smaller particle sizes than polymer polyols having equivalent viscosity. In a preferred embodiment of the present invention, a first reaction product is obtained by feeding the following materials to a first continuous reactor in the presence of a free radical initiator or catalyst: (a) less than about 50 wt. % of a total monomer proportion or monomer mixture, preferably comprising styrene/acrylonitrile at a ratio preferably greater than about 50/50 wt. %; (b) at least about 50 wt. % of a total base polyol proportion; (c) a majority of a precursor stabilizer; and, (d) a polymer control agent (PCA). The product from this first reaction then is again fed through a continuous reactor, which may be the same as the first reactor, along with additional initiator, at least about 50% of the total monomer proportion, and, optionally, any balance of the total base polyol proportion, precursor stabilizer, and PCA. The product from this second reactor is a high stability, low viscosity polymer polyol.

Low viscosity polymer polyols with improved dispersion stability

It has been discovered that particular flexible polyurethane foam formulations having a chlorinated alkane incorporated therein have the advantage of improved combustion resistance, but also unexpectedly the additional advantages of improved durability (dynamic fatigue), and better processing in terms of a delayed onset of gel. These results were surprisingly achieved with the use of a chlorinated alkane as the sole component to improve combustion resistance. Incorporation of as much as 34 parts of chlorinated alkane per hundred parts of polyol have been accomplished.

Flexible polyurethane foams using chlorinated alkanes

The present invention provides polymer polyols and a method for preparing polymer polyols which have (1) exceptional dispersion stability, especially at high styrene contents, and (2) substantially smaller particle sizes than polymer polyols having equivalent viscosity. In a preferred embodiment of the present invention, a first reaction product is obtained by feeding the following materials to a first continuous reactor in the presence of a free radical initiator or catalyst: (a) less than about 50 wt % of a total monomer proportion or monomer mixture, preferably comprising styrene/acrylonitrile at a ratio preferably greater than about 50/50 wt %; (b) at least about 50 wt % of a total base polyol proportion; (c) a majority of a precursor stabilizer; and, (d) a polymer control agent (PCA). The product from this first reaction then is again fed through a continuous reactor, which may be the same as the first reactor, along with additional initiator, at least about 50% of the total monomer proportion, and, optionally, any balance of the total base polyol proportion, precursor stabilizer, and PCA. The product from this second reactor is a high stability, low viscosity polymer polyol.

A process for manufacture of molded, high resiliency, polyurethane foam substantially free of volatile organic blowing agents comprising feeding at least three streams into a mixing device to form a reaction mixture, wherein a first stream contains (i) a polyol, (ii) water, (iii) a catalyst, (iv) a surfactant; a second stream contains an organic polyisocyanate; and a third stream contains (i) water, (ii) a crosslinking/extending agent, and (iii) a process/foam modifier.

Reactive feed stream to replace inert blowing agent feed stream in a

Hexahydro-s-triazines, and in particular hexamethylenetetramine (HMT), can be used in high water (5.0 or more parts per hundred parts of polyol) flexible polyurethane foams formulations in place of conventional gellation catalysts to produce open celled molded foams with excellent surfaces and with cores free of discoloration.

Process for producing flexible polyurethane foam using

A process for the manufacture of low density flexible polymethane foam via a catalyzed reaction of a highly reactive, high ethylene oxide, high functionality polyol, a hydrophilic polyhydric compound, water and polyisocyanates.

Process for the manufacture of low density, flexible polyurethane foams

This invention relates to silicon-based polymer/polyol stabilizers, processes for their manufacture and polyurethane foams containing these stabilized polymer polyols.

Silicone-based stabilizers useful in the preparation of improved

A normally liquid, stable polymer/polyol composition which imparts improved combustion resistance to polyurethane foams prepared therefrom while retaining satisfactory foam tensile properties are formed by polymerizing in the presence of a free radical catalyst and in the essential absence of an alkyl mercaptan, (1) from about 25 to about 60 weight percent of an ethylenically unsaturated monomer or monomers, for example, a mixture of acrylonitrile and styrene in a weight ratio respectively of 25:75 to 0:100, dissolved or dispersed in (2) from about 40 to about 75 weight percent of a polyol comprising a base polyol having a hydroxyl number of less than about 150, wherein the polymer is characterized by a crosslinking coefficient of less than 55 and an intrinsic viscosity of at least 0.30. A process for treating the resulting polymer/polyol composition to reduce the product viscosity to essentially the indigenous system viscosity in polymer/polyol compositions of this type is disclosed, as is a stabilizer precursor which assists in stabilizing the resulting polymer/polyol compositions.

Polymer/polyols having improved combustion resistance and intrinsic

A stable dispersion of a polymer in a polyol which imparts improved combustion resistance to polyurethane foams prepared therefrom wherein the polymer is a free-radical initiated copolymer containing from about 0.5 to 75 weight percent, based on the copolymer, of acrylonitrile and from about 25 to 99.5 weight percent, based on the copolymer, of at least one other polymerizible ethylenically unsaturated monomer and wherein the copolymer is characterized by a crosslinking coefficient of less than 55.

Polymer/polyol compositions having improved combustion resistance

The invention provides polyurethane elastomers having satisfactory modulus characteristics which are prepared from a polyol-chain extender mixture consisting of (1) a poly (oxypropylene-oxyethylene) polyol having a hydroxyl number of from about 20 to 60, an oxyethylene cap of from about 10 to 30 weight percent and an internal oxyethylene content of from about 30 to 60 weight percent and (2) ethylene glycol, or a polymer/polyol-chain extender mixture wherein the polyol-chain extender is as aforesaid, and the resulting polyurethane elastomers possess unexpected hydrolytic stability.

Growing community of inventors

South Charleston, WV, United States of America

Frank E Critchfield